I'm sometimes asked what "emerging church" means. Of course, everyone has a slightly different answer to that question, but for those who are interested in a serious answer, I highly recommend Scot McKinght's notes from his lecture at the Fall Contemporary Issues Conference at Westminster Theological Seminary. (The context of the presentation makes his thoughts especially useful to people who come from a Calvinist bent, but it is an excellent, excellent overview for anyone, not just WTS types.)
I don't know if it exists anywhere in an HTML format, but you can grab the PDF of it here. It will be well worth your time.
Update: The PDF is no longer on the server. If you are interested in it, I grabbed a copy. Leave a comment here that includes your email address, and I will send it to you.